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Both start with a 3-day free trial and run on your own machine. Cancel or switch anytime.

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License key

Paste it into the app’s Accounts & API keys tab (or LICENSE_KEY= in .env). It tells ArbTrader which plan you’re on. Keep it private, like a password.

Support ID — · quote it if you contact support.

Download & set up

ArbTrader runs on your own computer or server (Python 3.10+). Your exchange keys stay there and never come to arbtrader.co.

1. Unzip it and run pip install -r requirements.txt.
2. Start it with python3 -m uvicorn backend.main:app and open localhost:8000.
3. In Accounts & API keys, paste your license key, then add your Kalshi, Polymarket and The Odds API keys for live prices.
4. Pro: turn on order tickets and set a max cost per order in the same tab. Nothing is sent until you confirm a ticket.

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Payment

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Switch plans, update your card, or cancel in Stripe’s billing portal.